Microsoft's stock rockets more than 15% for largest single-day jump in history - Yahoo Finance
Microsoft stock surged 15.5% following a strong Q4 earnings report that exceeded analyst expectations for both revenue and EPS. Growth in Azure cloud services and the adoption of Microsoft 365 Copilot were cited as primary drivers for the record-breaking market value increase.
Why it matters
Microsoft's performance serves as a bellwether for the broader tech sector's ability to monetize AI investments and maintain cloud growth momentum.
Microsoft's stock rockets more than 15% for largest single-day jump in history Daniel Howley · Technology Editor Thu, July 30, 2026 at 4:03 PM EDT 1 min read MSFT +3.02% Trade MSFT on Coinbase Trading disclosure Trading disclosure The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link. Prices displayed are informational.
Microsoft (MSFT) surged 15.5%, the largest single-day market-value increase in stock market history, after posting better-than-expected Q4 earnings.
Microsoft has been a laggard for much of the year due to concerns about its AI spending and questions about when it would see a return on its billions in investments.
But Investors appeared to get the answers they were looking for in the company's Q4 report and forward guidance.
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